KR100559849B1 - A location structure of sensor and a method for decision dynamic state of automobile - Google Patents

Abstract

The present invention relates to a mounting structure and a determination method of a sensor for determining a dynamic state of a vehicle, the determination method comprising: encoding steps of sensors (RH S1, LH S1, FR S1, RR S1) mounted on a vehicle; Comparing the input value of each sensor with a reference value of each sensor; Determining the direction and the size of each sensor based on the calculated sensor value through a vehicle dynamic state determination module; And determining a dynamic state such as a front, rear collision, rollover, or other collision of the vehicle according to the determination result in the step.

Sensor, Dynamic, Rolling, Pitching, RollOver

Description

{A location structure of sensor and a method for decision dynamic state of automobile}

1 is a mounting structure of the sensor for determining the dynamic state of the vehicle according to the present invention.

2 is a conceptual diagram of inter-sensor interfacing according to the present invention.

3 is a flow chart for determining the dynamic state of the vehicle according to the present invention.

Figure 4a is a front or rear collision situation of the vehicle according to the present invention.

Figure 4b is a rollover situation of the vehicle according to the present invention.

4c is another collision situation of the vehicle according to the present invention.

5 is a collision mode determination by the direction of the sensor according to the present invention.

The present invention relates to a mounting structure and a determination method of a sensor for determining a dynamic state of a vehicle, and more particularly, to determine a dynamic state such as rolling, pitching, and rollover of a vehicle. The mounting position of the sensor and a method for determining the dynamic state of the vehicle in real time through the sensor.

In determining the dynamic state of a conventional vehicle, an accelerometer, an accelerometer, and the like are used. That is, the required physical quantity is acquired and converted from the accelerometer and the acceleration signal using each accelerometer, and the algorithm using the data determines the dynamic state and the rollover state of the vehicle.

However, in the conventional vehicle dynamic state determination method, the accelerometer and the determination method using each accelerometer have a problem that the processing speed of the rollover state determination is delayed, and the sensing medium of the accelerometer sensor is also affected by the vibration of a very fine vibrator. Since the acceleration is sensed, there is a problem that the reliability of the determination result is lowered.

The present invention has been made to solve the problems of the prior art, an object of the present invention is to determine the dynamic state of the rolling, pitching and rollover of the vehicle in real time through the appropriate positioning and mounted sensors of the dynamic sensor It is to provide.

Another object of the present invention is to simplify the rollover determination algorithm of a vehicle using the acceleration and the angular velocity of a conventional vehicle and to provide a method capable of determining the dynamic state of the vehicle in real time.

Still another object of the present invention is to suppress the influence of electric and electromagnetic wave paths and to improve the judging ability of an airbag ECU.

The present invention for achieving the above object,

Encoding the sensors (RH S1, LH S1, FR S1, RR S1) mounted on the vehicle;

Comparing the input value of each sensor with a reference value of each sensor;                         

Determining the direction and the size of each sensor based on the calculated sensor value through a vehicle dynamic state determination module; And

According to the determination result in the step, the determination of the dynamic state, such as the front, rear collision or rollover (RollOver) or other collision of the vehicle is included.

The present invention is a method for determining the dynamic state of the rolling, pitching and rollover of the vehicle in real time through the appropriate positioning and mounted sensors of the dynamic sensor (shortening sensor). Hereinafter, with reference to the drawings will be described a preferred embodiment according to the present invention.

Example

A mounting structure of a sensor for determining a dynamic state of a vehicle according to an embodiment of the present invention will be described with reference to FIG. 1.

As shown in Figure 1, the sensor according to an embodiment of the present invention is located in the front, rear and left, right of the vehicle. In other words, the LH S1 located on the left side and the RH S1 located on the right side are mounted on the center pillars (aka B-PLR) LH and RH, which are intermediate pillars between the front and rear doors of the vehicle, respectively. , Right movement). The + direction of the sensor is the + Z direction.

In addition, the FR S1 located at the front of the vehicle and the RR S1 located at the rear of the vehicle are mounted at the front and rear of the vehicle (the mounting position is preferably mounted at the center of the front and rear), and the pitching state of the vehicle ( Before and after movement. The + direction of the sensor is the front direction of the vehicle.

In the above, in the present invention, in order to simplify the dynamic state determination algorithm of the vehicle, a single-axis sensor using only the X direction and the Z direction is used as the dynamic sensor. However, the present invention is not limited thereto, and a multi-axis sensor may also be used. .

As described above, the structure of the inter-sensor interfacing to determine the dynamic state of the vehicle is mounted on the left, right, front, and rear of the vehicle as shown in FIG.

As shown in FIG. 2, FR S1 (X direction) and RR S1 (X direction), which are sensors installed at the front and rear of the vehicle, and LH S1 (Z direction) and RH S1 (Z, which are sensors installed at the left and right sides, respectively. Direction) The output values of the sensors after the comparison of the values of the sensors with each reference value (Ref X or Ref Z) are made through the vehicle's dynamic state determination module (the value converted from the electrical signals of each sensor into digital data). It is output as a vector quantity with and direction (+ or-). The output value is used to determine the current dynamic state of the vehicle (front, rear collision or overturning state or other collision situation).

In the above, the reference value (Ref X or Ref Z) according to an embodiment of the present invention is a value expressed as an absolute value, a value determined as a test value according to the characteristics of the vehicle.

As such, the basic concept of determining the dynamic state of the vehicle according to the embodiment of the present invention is as follows.

First, the rolling status determination of the vehicle [determination of left and right movement of the vehicle],                     

Judging by the comparison between the left sensor (LH S1) and the right sensor (RH S1),

The criterion determines the dynamic state of the vehicle by storing the current state of the vehicle.

Second, the vehicle pitching status determination [determination of the movement of the vehicle before and after],

Judging by the comparison between the front sensor FR S1 and the rear sensor RR S1,

The criterion determines the dynamic state of the vehicle by storing the current state of the vehicle.

Third, the rollover status determination [vehicle rollover status determination] of the vehicle,

Judging by a combination of the Rolling and Pitching Status,

The criterion is a test value according to the characteristics of the vehicle and is determined by setting a reference value of the RollOver status judgment. Hereinafter, a method of determining a dynamic state of a vehicle according to an exemplary embodiment of the present invention will be described.

3 is a flowchart for determining a dynamic state of a vehicle according to an exemplary embodiment of the present invention.

As shown in FIG. 3, first, a coding step of the sensors RH S1, LH S1, FR S1, and RR S1 mounted on the vehicle is performed [S10]. The coding of the sensor is to make it possible to distinguish each sensor signal (LH S1, RH S1, FR S1, RR S1).

After the sensor is coded, the input value of each sensor is input to the dynamic state determination module of the vehicle to determine the dynamic state of the vehicle after comparison operation with the reference value of each sensor [S20]. Using the input sensor value, the step of determining and outputting the direction and size of each sensor is performed in the dynamic state determination module of the vehicle [S30]. That is, the dynamic state determination module of the vehicle outputs a vector quantity having a direction and a magnitude, and the determination of the dynamic state of the vehicle is performed using the data [S40 to S60].

According to the determination result in the steps [S40 ~ S60], the dynamic state of the vehicle is classified as follows.

First, the front or rear collision situation of the vehicle [S40].

In this case, as shown in FIG. 4A, the direction of the sensor is the same as that of the left and right sensors LH S1 and RH S1, and the directions of the front and rear sensors FR S1 and RR S1 are the same. In addition, the size of the sensor has the same left and right sensor values, that is, the error of each sensor value is within the set range, and the front and rear sensor values are the same, that is, the error of each sensor value is within the set range. The magnitude of the front and rear sensor values is larger than that of the right sensor. In addition, depending on the collision direction (front or rear), the size of each of the front and rear sensors will be different from each other. That is, the sensor value in the collision direction will be relatively large.

Second, there is a rollover situation of the vehicle [S50].

In this case, as shown in FIG. 4B, the direction of the sensor is the same as that of the front and rear sensors FR S1 and RR S1, but the directions of the left and right sensors LH S1 and RH S1 are different. That is, in this case, as the rolling state of the vehicle, rollover of the vehicle may occur according to the size of the sensor. Although the sensor size is the same as the front and rear sensor values, that is, the error of each sensor value is within a set range, but it is relatively smaller than the left and right sensors. On the other hand, the size of the left and right sensor values is relatively larger than the size of the front and rear sensor values, and a size difference occurs between the left and right sensors.

Third, other collision situations of the vehicle [S60].

In this case, as shown in Figure 4c, the case of the vehicle inclination, pole collision, car-to-car collision.

As described above, collision mode determination by the direction of the combinable sensor is illustrated in FIG. 5. 5 is a collision mode determination table considering only the direction.

As shown in FIG. 5, in the case of front and rear collisions, the directions of the left and right sensors are the same, and the directions of the front and rear sensors are the same. In this case, the forward collision is the case in the X + direction, while the rear collision is the case in the X- direction. The setting of the + or-direction is adjustable by the setting of the sensor, and thus the determination of the direction of + or-is the result of the test value by the dynamic characteristics of the vehicle.

In addition, the rolling state of the vehicle is a case in which the front and rear sensors have the same direction while the left and right sensors have different directions. That is, the direction of the left and right sensors are periodically generated differently, and at this time, the rolled state is changed from the rolling state to the rollover state according to the size difference between the left and right sensors.

In addition, in the table of FIG. 5, the "non-availability" determination is a case where it is difficult to occur in an actual situation, and a situation such as simultaneous collision occurs in the front and rear of one vehicle.

For reference, in the collision mode determination table shown in FIG. 5, the notation (A, B, C, etc.) of the output value is a notation set arbitrarily by the user to indicate the combination of the respective sensor directions.

In interpreting the technical scope of the present invention, it should not be construed as being limited to the embodiments described above, the technical scope of the present invention should be determined by reasonable interpretation of the matter described in the claims.

Effects of the mounting structure and the determination method of the sensor for determining the dynamic state of the vehicle of the present invention are as follows.

First, the simplification of the algorithm for determining the dynamic state of the conventional vehicle.

Secondly, the reliability of the vehicle is improved over that of the conventional vehicle dynamic determination algorithm.

Third, it is possible to determine the rolling state of the vehicle by using only two left and right sensors of the vehicle.

Fourth, it is possible to determine the pitching state of the vehicle using only two sensors before and after the vehicle.

Fifth, there is a shortening of the time required for the rollover state determination by simplifying the vehicle dynamic state determination algorithm.

Sixth, the determination of forward or rearward collisions as well as rolling, pitching and rollover of the vehicle is possible.

Claims (9)

In the mounting structure of the sensor for determining the dynamic state of the vehicle, Located at the left and right center pillar (B-PLR) of the vehicle, respectively, the left sensor (LH S1) and the right sensor (RH S1) for determining the rolling (Rolling) state of the vehicle; Located in front and rear of the vehicle, respectively, the mounting structure of the sensor for determining the dynamic state of the vehicle consisting of a front sensor (FR S1) and a rear sensor (RR S1) for determining the pitching (Pitching) state of the vehicle. The method of claim 1, Mounting structure of the sensor for determining the dynamic state of the vehicle, characterized in that the + direction of the left sensor and the right sensor is + Z direction. The method of claim 1, The + direction of the front sensor and the rear sensor is the mounting structure of the sensor for determining the dynamic state of the vehicle, characterized in that the front of the vehicle. The method according to any one of claims 1 to 3, wherein The sensor (LH S1, RH S1, FR S1, RR S1) is a dynamic sensor (short detection sensor), characterized in that the mounting structure of the sensor for determining the dynamic state of the vehicle. In the method for determining the dynamic state of the vehicle, Encoding the sensors (RH S1, LH S1, FR S1, RR S1) mounted on the vehicle; Comparing the input value of each sensor with a reference value of each sensor; Determining the direction and the size of each sensor based on the calculated sensor value through a vehicle dynamic state determination module; And And determining a dynamic state such as a front, rear collision, rollover, or other collision of the vehicle according to the determination result in the step. The method of claim 5, The reference value of each sensor compared with the input value of each sensor is determined as a test value according to the characteristics of the vehicle. The method of claim 5, wherein the front or rear collision determination of the vehicle, The direction of the left and right sensors and the front and rear sensors are the same, the size of the left and right sensor values are the same, and the size of the front and rear sensor values is different depending on the vehicle collision direction. Judgment method. The method of claim 5, wherein the rollover of the vehicle is determined. The direction of the front and rear sensors is the same, the direction of the left and right sensors are different, the size of the front and rear sensor values are the same, the size of the left and right sensor values are different. . The method of claim 5, wherein the other collision of the vehicle, Method for determining the dynamic state of the vehicle, characterized in that the case of the vehicle tilt, pole collision, vehicle-to-vehicle collision.

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